Sole-trimming machine



Oct. 7, 1930. E. E. MURPHY 1,777,473.l

SOLE TRIMMINGMACHINE Filed oct.- 2'9, 192'? Patented @et 7, 1930 nvnnn'rr n. iinariiv, or NEWBURYPORT, MASSACHUSETTS, assiettesfro UNITED SOLE-TRIMMING MACHINE .Application lec'i October 20, 1927, Serial No. 227,555, and in Great Britain December 19,25.

the purpose of facilitating the feeding and guiding of the Workv in suoli machines.

llllith theabove object in View, one feature of the present invention consists in the provision, in machine fortrimming a sole having asseinbled therewith a shoe bottom inember previously trimmed substantially to final' shape, of a trimming knife, means for engaging the previously trimmed bottom member to v guide the shoe relatively to the knife, said means andsaid knife being relatively arp ed to insure trimming of the sole to the shape of said bottom member, and a driven the sole and to co-o'perateivith said means in supporting and guiding the shoe.

Another feature of the invention consists in tl e provision, in combination With a knife con ucted and arranged to trim the outsole of :i shoe, f a Work guide or bearing for supporting the shoe against the thrust of the knife, and a rotaiyedge gage on said 'bearing 'lor engaging a trimmed orothervvise previously shaped edge portion of the shoe bottom to locate an untrimmed tread portion of the shoe bottom relatively to the trimming inife. l v

ln the `illus rated embodiment of the invention there is employed both a driven feed roll for engaging the tread face of the sole` for operating upon this particuroll arranged toengage the tread face of'v i liournaled inthe yoke 16 anda cylindrical arm and a rotary edge gage arranged to engage the trimmed edge of the Welt, and the rotary edge gage is connected to be driven iii timed relation With the feed roll the better to facilitate the feeding and guiding of the Work.

The invention Will he explained in connection VWith the accompanying drawings, in Which p Fig. 1 is a vertical sectional `vien7 of the head of a sole rounding machine which the present invention is embodied;

Fig. 2 is a perspective view of the Work guide or bearing shovvn in Fig.v 1 showing als',

the driven feed roll and illustrating the inode of operation of the Work guide and the feed roll upon the Work;

Fig. 3 is' a view in rear elevationV of the c WorkV guide showing particularlyV the driven rotary edge gage Which is mounted thereon;

l Fig. 4 isa View, partially in section and partially in elevation, of the parte shown in Fig. 2; and u Fig. 5 is a view, partially in front elevation andpartially in section,`of the Work guide, the driven feed roll,V and the driving mechaA nism associated therewith.

The illustrated machine is provided y ith a reciprocating trimming knife 'l0 having a lateral cutting edge 12 (F ig. 3) the shape o the knife and the mode of operation of i knife being substantially the saine as c isclosed in the `Letters Patent No 1,657,632 above referred to. As shown, the knife 10 is rigidly secured to a slide 1a and the slide 14 is reciprocatedhorizontally by means Vof an oscillating yoke 16 provided With. horizon tal arm 18 connected With the slide and also provided With vertical trunnions 2O mounted in bearings in the Vfra-me or head 22 of the machine. The arm 18 carries a roll 24 Which is engaged by bearing blocks 26' arranged hen tween` transverse ribs 28 on the under side o" the knife'slidelll. A horizontal shaft 3G i 32 is secured upon the shaft 30 and extend right angles thereto. The cylindrical ai' n lits Within an inclined bearing formed in the enlarged extremity Sil of a pmvendriven shaft 8th The means just 'described for reciprocating the trimming knife is similar in construction and mode of operation to corresponding means disclosed in U. S. Letters Patent No. 1,030,606, granted June 25, 1912, in the name of F. H. Perry, to which reference may be had for further description and illustration thereof.

To illustrate the operation of the vmachine the operative parts of the machine are shown in F igs. 2 and 4 as acting upon a shoes having a bottom comprising awelt W' and a twoply sole consisting of first and second units or layers C and C of crepe rubber.

While the work is being trimmed by the knife 10 the work is fed by a feed roll 40 past a work guide 42. The feed roll 40 is arranged to engage the tread surface of the second or outer crepe sole unit C and, as shown, the knife is arranged to move in a path at right angles to the axis of the roll and is located close to the end of the roll so that the roll will engage the sole and support it substantially at the point Where the knife is acting upon it. The periphery of the roll is toothed or corrugated to enable it to secure better feeding engagement with the sole and the lower portion of the roll is tapered or rounded so that lower ends of the teeth will not sink into the sole so as to leave any defacing marks thereon. Referring to Fig. 4 the roll 40 is secured to the upper end of a vertical shaft 44 journaled within a holder 45 which is formedv at the outer end of a. sleeve 46 (Fig. 1,). The sleeve 46 is mounted to slide Within a fixed horizontal bearing 48 and is prevented from turning within the bearing by means of ank arm 50 fixedly secured to the reduced inner end of the sleeve 46 and provided with a yoked lower extremity 52 arranged to straddle and slide upon ahorizontal rod 54 the ends of which are supported in fixed lugs 56 on the head of the machine. The feed roll 40 is driven from the shaft 36 through connections which will now-be described. A bevel gear 58, fixed to the vertical shaft 44, meshes with a bevel gear 60 fixed to the end of a horizontal shaft 62 which is journaled within the sleeve 46 and extends through a sleeve 64 which in turn is journaled within fixed bearings 66 and 68, the latter being carried by the horizontal rod 54. The shaft 62 is splined, as indicated at 70, to the sleeve 64 so that the shaft is connected to turn with the sleeve but is capable of sliding within the sleeve. The sleeve 64 has fixed there-- on a spiral gear 7 2 located between the bearings 66 and 68. These bearings 66 and 68, by engagement with the opposite ends of the hub' of the gear 72, serve to prevent axial displacement of the gear and the sleeve 64. Meshing with. the gear 7 2 is a gear 74 (Fig. 5) fast on a shaft 7 6 which is journaled in inclined bearings 78. The shaft 76 is driven from the shaft 86 through intermeshing spiral gears 80. vThe feed roll 40 is urged f forwardly to maintain it in yielding engage` ment with the tread face of the sole unit C by means of a spring 82 (Fig. 1), the lower end of which is connected to an arm 84 secured to a rockshaft 86. A second arm 88 secured to the rockshaft 86 is connected with a rod 90V which extends within the bearing 66 and the front end of which engages the rear extremity of the shaft 62. The feed roll 40 may be moved rearwardly against the action of the spring 82, in introducing or removing the work, 'by means of mechanism comprising a rockshaft 92, one end of which rcarries an arm 94 engaging a lug 96 on the arm 50. A bell crank lever 98 is secured to the rockshaft 92 and one arm of the lever 98 extends downwardly into a position conveniently to be grasped by the hand of the operator, while the other arm of the bell crank lever 98 is connected by a rod 100 with an operating treadle (not shown). By means of the treadle or the hand lever 98 the feed wheel may be retracted to facilitate the insertion and removal of the work.

It will benoted that the periphery of the feed roil 40 is shaped to afford a substantial area of feeding contact with a sole positioned with its tread face substantially parallel to the axis of the feed roll. Furthermore the feed roll 40 is located close to the knife 10 so that it will support the sole margin practically at the very portion where the knife is operating.

The work guide 42 is fixedly secured by screws 102 to the frame of the machine and is formed with a vertical bearing surface or shoulder 104 (Figs. 2 and 3) for engaging the outer or exposed side of the welt to support the work against the outward end thrust of the trimming knife and to assist in guiding the work as it is fed. The screws 102 extend through vertical slots 105 arranged to permit vertical adjustment of the work guide. The work guide 42 is shaped to avoid interference with the tip of the trimming knife which projects beyond the sole and overlaps the welt. To this end the work guide 42 is provided with a slot 106 within which the tip of the knife 10 is received. The slot 106 is shaped and arranged to support the knife against edge thrust caused by feeding the work against the knife and also against downward sidewise thrust, i. e., flatwise displacement of the knife, resulting from the pressure of the work against the beveled upper face of the knife. For these purposes the lower side wall of the slot 106 is arranged. to engage the lower side of the knife while one ofthe end walls of the slot 106 is arranged to engage the back or unsharpened edge of the knife, The slotted lower extremity of the work guide 42 is beveled to adapt it to project into the welt crease of a shoe as shown inFig. 4. As the work is fed the exposed face of the welt rides over the smooth bear ing surface 104 of the work guide 42 and thus lll' closely adjacent to one end of the `roll so that the latter will engage the sole close to the point being actednpon'by the knife.

7. In a machine of the class described, in combination, a trimming knife, a fixed bearing for rigidly supporting the bottom of a shoe againstthe thrust of the knife, a rotary edge gage on said bearing for engaging the edge of a previously trimmed portion of the shoe bottom to locate an untrimmed portion of the shoe bottom relatively to the knife, and means for positively rotating the edge gage.

8. In a machine of the class described, in combination, a trimming knife, a driven feed roll for engaging the thread face of the sole of a shoe, a rotary edge gage for engaging the edge of a previously trimmed portion of the bottom of the shoe to determine the location of the trimming cut and arranged to l0- cate the portion engaged thereby in line with the trimming knife, and means for driving the feed roll and the edge gage in timed relation.

9. In a machine of the class described, in combination, a trimming knife beveled at one side to provide a lateral cutting edge, means for reciprocating the knife in a direction substantially parallel Vto said cutting edge, means for engaging the edge of a portion of a shoe bottom previously trimmed substant-ially to final contour to gage the location of the trimming cut, and a bearing for the opposite side of the knife constructed andarranged to support the knife to prevent flat- Wise displacement thereof resulting from engagement of the Work with the beveled side of the knife.

10. In a machine of the class described, in combination, a trimming knife having a beveled face providing a lateral cutting edge, means for reciprocating the knife in a horizontal path substantially parallel to said cutting edge, Work guiding means for engaging the edge of a portion of a shoe bottom previously shaped substantially to final contour to gage the location of the trimming cut, and a bearing for the lateral margin of the shoe bottom immediately beneath the knife to support the shoe bottom against the end thrust of the knife.

11. In a machine of the class described, in combination, a guide roll arranged to engage the edge of a port-ion of a shoe bottom previously shaped substantially to final contour, a. trimming knife having a lateral cutting ously shaped substantially to final contour, a trimming knife having a lateral cutting edge extending substantially parallel to the axis of the guide roll and located close to the periphery of the roll, means for reciprocating the knife in a direction substantially parallel to the axis of the roll, and means arranged to engage opposite sides of the margin of the shoe bottom to support the Work against the end thrust of the knife in both directions.

13. In a machine of the class described, in combination, a guide roll arranged to engage the edge of a portion of a shoe bottom previ- 4ously shaped substantially to final contour, a

trimming knife having a lateral cutting edge extending substantially parallel to the axis of the guide roll and located close to the periphery of the roll, means for reciprocating the knife in a direction substantially parallel to the axis of the roll, means for supporting the Work against the end thrust of the knife in one direction, and means for feeding the Work and supporting it against the thrust of the knife in the opposite direction.

In testimony whereof I have signed my name to this specification.

EVER-ETT E. MURPHY.

edge extending substantially parallel to the axis of the guide roll and located close to the periphery of the roll, means for reciprocating the knife in a direction substantially parallel to the axis of the roll, and means for supporting the Work against the end thrust of the knife.

12. In a machine of the class described, in combination, a guide roll arranged to engage the edge of a portion of a shoe bottom previ- 

